Pressure effects on electrical conductivities in intercalated graphite and doped polypyrrole

• We have measured the pressure dependence up to 2.5 GPa of the electrical resistance of the acceptor intercalated graphites CnFeCl3, CnSbF5, and CnHNO3. The slope of resistance versus pressure is approximately the same in all cases. Two different types of high pressure transitions are observed in CnSbF5 and CnHNO3. The results of electrical resistance measurements under pressure in polypyrrole are consistent with a simple extension of the variable-range-hopping model. We infer for this material that the density of states at the Fermi level increases with pressure.

Subject headings

NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

Keyword

Electrical conductivity

intercalation compound

graphite

FeCl3

SbF5

HNO3

polypyrrole

hopping conductivity

high pressure

Condensed matter physics

Kondenserade materiens fysik

fysik

Physics

Publication and Content Type

ref (subject category)

kon (subject category)